(19)

(11)

EP 4 055 252 A1

(12)

(43) Date of publication: 14.09.2022 Bulletin 2022/37 (21) Application number: 20884023.1 (22) Date of filing: 06.11.2020

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) E21B 43/16(2006.01) F04D 13/10(2006.01) (52) Cooperative Patent Classification (CPC): F04D 13/10; F04D 1/063; F04D 29/426; F04D 29/622 (86) International application number: PCT/US2020/059469 (87) International publication number: WO 2021/092430 (14.05.2021 Gazette 2021/19)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 08.11.2019 US 201962933131 P (71) Applicant: Baker Hughes Oilfield Operations, LLC Houston, Texas 77073 (US)	(72) Inventors: YE, Zheng Houston, Texas 77073 (US) FORSBERG, Michael Houston, Texas 77073 (US) RUTTER, Risa Houston, Texas 77073 (US) WILLIAMS, Brett T. Houston, Texas 77073 (US) (74) Representative: Novagraaf Group  Chemin de l'Echo 3 1213 Onex/ Geneva 1213 Onex/ Geneva (CH)